CN110350450A - The cable accessory of thermal conductivity with raising - Google Patents

The cable accessory of thermal conductivity with raising Download PDF

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Publication number
CN110350450A
CN110350450A CN201910276147.6A CN201910276147A CN110350450A CN 110350450 A CN110350450 A CN 110350450A CN 201910276147 A CN201910276147 A CN 201910276147A CN 110350450 A CN110350450 A CN 110350450A
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CN
China
Prior art keywords
cross
linked layer
attachment
layer
polymer material
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
CN201910276147.6A
Other languages
Chinese (zh)
Inventor
巴兹尔·萨勒梅
阿德里安·沙尔梅坦特
米凯尔·劳伦特
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Gloomy Co Of Nike
Nexans SA
Original Assignee
Gloomy Co Of Nike
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Gloomy Co Of Nike filed Critical Gloomy Co Of Nike
Publication of CN110350450A publication Critical patent/CN110350450A/en
Pending legal-status Critical Current

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Classifications

    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02G—INSTALLATION OF ELECTRIC CABLES OR LINES, OR OF COMBINED OPTICAL AND ELECTRIC CABLES OR LINES
    • H02G15/00—Cable fittings
    • H02G15/08—Cable junctions
    • H02G15/18—Cable junctions protected by sleeves, e.g. for communication cable
    • H02G15/184—Cable junctions protected by sleeves, e.g. for communication cable with devices for relieving electrical stress
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02G—INSTALLATION OF ELECTRIC CABLES OR LINES, OR OF COMBINED OPTICAL AND ELECTRIC CABLES OR LINES
    • H02G15/00—Cable fittings
    • H02G15/08—Cable junctions
    • H02G15/18—Cable junctions protected by sleeves, e.g. for communication cable
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
    • C08L83/00—Compositions of macromolecular compounds obtained by reactions forming in the main chain of the macromolecule a linkage containing silicon with or without sulfur, nitrogen, oxygen or carbon only; Compositions of derivatives of such polymers
    • C08L83/04—Polysiloxanes
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
    • H01B3/00—Insulators or insulating bodies characterised by the insulating materials; Selection of materials for their insulating or dielectric properties
    • H01B3/02—Insulators or insulating bodies characterised by the insulating materials; Selection of materials for their insulating or dielectric properties mainly consisting of inorganic substances
    • H01B3/12—Insulators or insulating bodies characterised by the insulating materials; Selection of materials for their insulating or dielectric properties mainly consisting of inorganic substances ceramics
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
    • H01B3/00—Insulators or insulating bodies characterised by the insulating materials; Selection of materials for their insulating or dielectric properties
    • H01B3/18—Insulators or insulating bodies characterised by the insulating materials; Selection of materials for their insulating or dielectric properties mainly consisting of organic substances
    • H01B3/30—Insulators or insulating bodies characterised by the insulating materials; Selection of materials for their insulating or dielectric properties mainly consisting of organic substances plastics; resins; waxes
    • H01B3/44—Insulators or insulating bodies characterised by the insulating materials; Selection of materials for their insulating or dielectric properties mainly consisting of organic substances plastics; resins; waxes vinyl resins; acrylic resins
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
    • H01B3/00—Insulators or insulating bodies characterised by the insulating materials; Selection of materials for their insulating or dielectric properties
    • H01B3/18—Insulators or insulating bodies characterised by the insulating materials; Selection of materials for their insulating or dielectric properties mainly consisting of organic substances
    • H01B3/30—Insulators or insulating bodies characterised by the insulating materials; Selection of materials for their insulating or dielectric properties mainly consisting of organic substances plastics; resins; waxes
    • H01B3/46—Insulators or insulating bodies characterised by the insulating materials; Selection of materials for their insulating or dielectric properties mainly consisting of organic substances plastics; resins; waxes silicones
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
    • H01B7/00—Insulated conductors or cables characterised by their form
    • H01B7/02—Disposition of insulation
    • H01B7/0258—Disposition of insulation comprising one or more longitudinal lapped layers of insulation
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
    • H01B7/00—Insulated conductors or cables characterised by their form
    • H01B7/17—Protection against damage caused by external factors, e.g. sheaths or armouring
    • H01B7/29—Protection against damage caused by extremes of temperature or by flame
    • H01B7/292—Protection against damage caused by extremes of temperature or by flame using material resistant to heat
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02G—INSTALLATION OF ELECTRIC CABLES OR LINES, OR OF COMBINED OPTICAL AND ELECTRIC CABLES OR LINES
    • H02G1/00—Methods or apparatus specially adapted for installing, maintaining, repairing or dismantling electric cables or lines
    • H02G1/14—Methods or apparatus specially adapted for installing, maintaining, repairing or dismantling electric cables or lines for joining or terminating cables
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02G—INSTALLATION OF ELECTRIC CABLES OR LINES, OR OF COMBINED OPTICAL AND ELECTRIC CABLES OR LINES
    • H02G15/00—Cable fittings
    • H02G15/003—Filling materials, e.g. solid or fluid insulation
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02G—INSTALLATION OF ELECTRIC CABLES OR LINES, OR OF COMBINED OPTICAL AND ELECTRIC CABLES OR LINES
    • H02G15/00—Cable fittings
    • H02G15/08—Cable junctions
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
    • C08K3/00—Use of inorganic substances as compounding ingredients
    • C08K3/38—Boron-containing compounds
    • C08K2003/382—Boron-containing compounds and nitrogen
    • C08K2003/385—Binary compounds of nitrogen with boron
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
    • C08K3/00—Use of inorganic substances as compounding ingredients
    • C08K3/34—Silicon-containing compounds
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
    • C08K3/00—Use of inorganic substances as compounding ingredients
    • C08K3/38—Boron-containing compounds
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02G—INSTALLATION OF ELECTRIC CABLES OR LINES, OR OF COMBINED OPTICAL AND ELECTRIC CABLES OR LINES
    • H02G15/00—Cable fittings
    • H02G15/02—Cable terminations
    • H02G15/06—Cable terminating boxes, frames or other structures
    • H02G15/064—Cable terminating boxes, frames or other structures with devices for relieving electrical stress
    • H02G15/068—Cable terminating boxes, frames or other structures with devices for relieving electrical stress connected to the cable shield only

Abstract

The present invention relates to cable accessories, the attachment is surrounded by least one electrical isolation cross-linked layer, the cross-linked layer includes at least one polymer material, boron nitride and silicon carbide, the present invention relates to the electric devices for including at least the cable accessory, the method for being related to manufacturing the attachment and described device, it is related to the purposes around cable accessory or the cross-linked layer in electric device, the cross-linked layer especially is used to promote heat dissipation, the present invention relates to the external members of connecting cable, and it is related to cable accessory, the attachment includes two kinds of different fillers of thermal conductivity.Cable accessory of the invention is surrounded with the layer of thermal conductivity raising, while ensure that good mechanical performance, and especially in terms of flexible and/or good electrical installation and/or watertightness performance, the layer is adapted to any type of variation of the diameter along accessories section.

Description

The cable accessory of thermal conductivity with raising
Technical field
The present invention relates to a kind of cable accessory, the attachment is surrounded by least one electrical isolation cross-linked layer, the cross-linked layer packet Containing at least one polymer material, boron nitride and silicon carbide, the present invention relates to the electric device for including at least the cable accessory, The method for being related to manufacturing the attachment and described device is related to around electric cable fitting or the crosslinking in electric device The purposes of layer, especially for promoting heat dissipation, the present invention relates to the external members of connection power cable, and are related to cable accessory, The attachment includes two kinds of different fillers of thermal conductivity.
Usually (but not specifically) applied to high-voltage power cable field, (the especially described voltage is greater than the present invention 60kV), and especially cable accessory field, such as cable connector, especially high voltage direct current connector (HVDC connector) or high pressure are handed over It flows connector (HVAC connector).
Background technique
The problem of cable connector overheats is well-known.It causes between the hottest point of the connector of cable and the cable Temperature increase.There may be many consequences, such as risk and/or electric fault of degradation, the breakdown of following polymeric layer for this.
A kind of inorganic thermal-protective coating known from 2015/053796 A1 of international application WO, it includes 5 weight % to 30 weights Measure the inorganic adhesive (such as metal silicate) of %, one or more radiation agents (such as boron nitride) of 2 weight % to 20 weight % And 45 weight % to 92 weight % filler (such as metal oxide).This layer can reduce the temperature of cable or cable accessory. However, the thermal-protective coating is not very soft, and especially because the diameter along the different piece of such attachment variation, Especially when attachment is connected to one or more cable, it was demonstrated that the thermal-protective coating is difficult to be installed around cable accessory. Finally, the thermal conductivity of unmeasured such layer.
Summary of the invention
Therefore, the purpose of the present invention is in the following manner come the shortcomings that overcoming the prior art: offer is surrounded with thermal conductivity The cable accessory of the layer of raising, while guaranteeing good mechanical performance, especially flexible and/or good electrical installation and/ Or in terms of watertightness performance, the layer is adapted to any type of variation of the diameter along accessories section.
It is a further object to provide a kind of simple, economic method, this method is easy to implement and this method The cable accessory with above-mentioned performance can be produced.
First theme of the invention is a kind of electric cable fitting, which is characterized in that the attachment is exhausted by least one electricity Edge cross-linked layer surrounds, and the cross-linked layer includes at least one polymer material, boron nitride and silicon carbide.
By the combination of polymer material, boron nitride and silicon carbide, cross-linked layer has the thermal conductivity improved, so as to make The heat generated in attachment preferably discharges.In addition, the cross-linked layer has good electrical insulation capability, and especially for mistake Voltage and protect attachment.The cross-linked layer is readily produced and installs, and can equably Thermal protection cable accessory and optionally It is connected to the cable section of attachment, no matter whether cross-linked layer has the structure for specific to attachment and being optionally directed to the part And/or profile.In addition, the cross-linked layer is flexible, this can be easily adapted to for attachment and optionally for connection To the structure and/or profile of the cable section of attachment.
In the present invention, statement " cable accessory " refers to the attachment for being intended to be connected to cable.
Relative to the total weight of cross-linked layer, cross-linked layer can include about 1 weight % to 30 weight % and preferably from about 2 weights Measure the boron nitride of % to 20 weight %.
Relative to the total weight of cross-linked layer, cross-linked layer can include about 2 weight % to 40 weight % and preferably from about 5 weights Measure the silicon carbide of % to 30 weight %.
A particularly preferred embodiment according to the present invention, relative to the total weight of cross-linked layer, cross-linked layer includes about 5 The boron nitride and about 15 weight % of weight % to 15 weight % to 25 weight % silicon carbide.Therefore, this allows to be crosslinked Thermal conductivity, production cost and the flexible aspect of layer obtain good compromise.
Advantageously, the range of the weight ratio of boron nitride and silicon carbide is 0.2 to 0.8.
According to a preferred embodiment, cross-linked layer includes the at most boron nitride and silicon carbide of 30 weight %.This makes The formation and/or manufacture (optimum viscosity of such as undefined cross-linkable composition) of cross-linked layer can be improved.
In the present invention, statement " micron particles (micrometric particle) " refers at least one dimension of particle Greater than or equal to about 1 μm.
According to a specific embodiment, boron nitride be the form of micron particles, especially size range be about 1 μm extremely 100 μm, and preferred scope is about 1 μm to 70 μm.By this partial size, optimization thermal conductivity is obtained, while ensure that friendship Join the good flexibility performance of layer.
According to a specific embodiment, silicon carbide is the form of micron particles, and especially size range is about 1 μm to 75 μm, and preferred scope is about 1 μm to 25 μm.By this partial size, the thermal conductivity of raising is obtained, while ensure that cross-linked layer Good flexibility performance.
Boron nitride can be the form of spheric granules or the form of elongated particle.
When boron nitride particle is spherical, average diameter range is preferably from about 30 μm to 60 μm.
Advantageously, boron nitride is the form of elongated particle.It is possible thereby to increase the heat conduction path in cross-linked layer.Boron nitride It especially can be the form of stick.
When boron nitride particle is elongated, average length preferably ranges from about 7 μm to 9 μm, and mean breadth range is excellent It is selected as about 200nm to 300nm.
The form of the preferably spherical particle of silicon carbide.It is possible thereby to increase the contact surface in cross-linked layer.
A particularly preferred embodiment according to the present invention, boron nitride is the form of elongated particle, and silicon carbide is The form of spheric granules.It is possible thereby to improve the thermal conductivity of cross-linked layer.Particularly, promoted in cross-linked layer boron nitride particle and Interaction between silicon-carbide particle.
In the present invention, it is preferred to using the size of scanning electron microscopy measurement particle, average diameter, average length or put down Equal width.
Preferably, cross-linked layer includes at most 1 weight %, preferably up to 0.5 weight %, particularly preferably at most 0.01 weight It measures % and does not preferably include one or more nitride in addition to boron nitride particularly, such as aluminium nitride or silicon nitride.
Preferably, cross-linked layer includes at most 10 weight %, preferably up to 5 weight %, particularly preferably at most 1 weight %, simultaneously And aluminium oxide is not preferably included particularly.
Polymer material may include one or more polymer, term " polymer " " it can be taken to mean that art technology Any type of polymer well known to personnel, as (such as block copolymer, random copolymer, ternary are total for homopolymer or copolymer Polymers etc.).
Relative to the total weight of cross-linked layer, cross-linked layer may include at least about 50 weight % and preferably at least about 60 weights Measure the polymer material of %.
Advantageously, relative to the total weight of cross-linked layer, cross-linked layer includes 55 weight % to 85 weight % and preferably from about 60 The polymer material of weight % to 80 weight %.
Polymer material can be thermoplasticity or elastomer type.
Polymer material is preferably selected from polysiloxane.
Polysiloxane generally comprises silicon, oxygen, hydrogen and carbon.Particularly, a part of silicon and oxygen form Si-O-Si type list Member.
According to a preferred embodiment of the invention, it is suitable as the poly- of the polymer material in cross-linked layer of the invention Organosiloxane includes the unit of lower formula (I):
Wherein R1And R2Group can be the same or different from each other and can be same or different to each other between each unit, R1With R2Group is hydro carbons group, is especially selected from alkyl, halogenated alkyl, naphthenic base, aralkyl, cyanoalkyl, alkenyl, haloalkene Base, cycloalkenyl, aryl, halogenated aryl and alkylaryl.
Polysiloxane may include the unit [- Si (R of n formula (I)1)(R2)-O-].N is preferably greater than or equal to 5, and More preferable 5 to 10000.
Alkyl, halogenated alkyl, aralkyl, alkaryl and cyanoalkyl can have 1 to 20 carbon atom, preferably 1 to 6 Carbon atom, and more preferable 1 to 3 carbon atom.
Alkenyl and halogenated alkenyl can have 2 to 10 carbon atoms, and preferably 2 to 6 carbon atoms.
Naphthenic base, cycloalkenyl, aryl and halogenated aryl can have 3 to 10 carbon atoms, and preferably 3 to 6 carbon originals Son.
R1(R2It respectively) is preferably alkyl, and more preferably methyl.
Polysiloxane can correspond to lower formula (II):
Wherein R1、R2There is definition same as described above with n, and
R3It indicates hydro carbons group, is especially selected from alkyl, alkenyl and alkoxyalkyl.
Alkyl and alkenyl are as defined above.
Alkoxyalkyl can have 1 to 10 carbon atom, preferably 1 to 6 carbon atom, and more preferable 1 to 3 carbon original Son.
A particularly preferred embodiment according to the present invention, polymer material are selected from silicone elastomer (or silicon rubber Glue).These have the advantages that assign this layer of excellent chemical inertness and good fire resistance.
Especially at 35 DEG C, the thermal conductivity of cross-linked layer can be at least 0.18W/m.K, preferably at least 0.20W/m.K, more Preferably at least 0.25W/m.K, and more preferably at least 0.3W/m.K, more preferably at least 0.35W/m.K, and more preferably at least 0.40W/m.K。
The instrument sold by Hot Disk company with trade name Hot Disk TPS 2500S can be used at about 35 DEG C Measure the thermal conductivity of cross-linked layer.
By the good thermal conductivity of cross-linked layer, the discharge of the heat generated at attachment level is promoted, without reducing The electric property and mechanical performance of attachment.
Layer of the invention is cross-linked layer.In the present invention, cross-linked layer can for example, by determine cross-linked layer gel content or The degree of cross linking characterizes, and is determined especially by the sample 24 hours for extracting in dimethylbenzene the layer at 100 DEG C.
More particularly, the gel content of cross-linked layer or the degree of cross linking can be at least 50%, preferably at least 60%, preferably at least 70%, and particularly preferably at least 80%.
In the present invention, term " electric insulation layer " refers to that its conductivity (at 25 DEG C) can be at most 1 × 109S/m, and And preferably up to 1 × 1010The layer of S/m (every meter of Siemens).
Cross-linked layer is preferably the form of gel.It is possible thereby to assign cross-linked layer enough flexibilities, to be adapted to the structure of attachment And/or profile and/or obtain good watertightness performance.
Advantageously, cross-linked layer is non-porous layer.
The layer can be by the way that well known to a person skilled in the art technologies to be crosslinked.
Cross-linked layer can advantageously have variable thickness, especially along the part of electric cable fitting to be protected. Cross-linked layer can be continuous covering, especially be made of single-piece.
The cross-linked layer of attachment of the invention can be advantageously by including boron nitride, silicon carbide and at least one polymer The cross-linkable composition of the precursor of material obtains.
A particularly preferred embodiment according to the present invention, it is cross-linking relative to the total weight of cross-linkable composition Composition includes the boron nitride of about 2 weight % to 20 weight % and the silicon carbide of about 5 weight % to 30 weight %, and preferred The boron nitride and about 15 weight % of about 5 weight % to 15 weight % to 25 weight % silicon carbide.It is possible thereby to cross-linking Thermal conductivity, production cost and the machinability aspect of composition obtain good compromise.
Relative to the total weight of cross-linkable composition, cross-linkable composition can include about 55 weight % to 85 weight %, simultaneously And the precursor of the polymer material of preferably from about 60 weight % to 80 weight %.
The precursor of the polymer material can be selected from crosslinkable oligomers, crosslinkable polymer and the polymer material Monomer.
The precursor of the polymer material preferably has at least one reactive functional groups.It is possible thereby to promote polymerization and/ Or crosslinking, to obtain the polymer material of cross-linked layer.
According to a preferred embodiment of the invention, the precursor of the polymer material is polysiloxane precursor, And more preferable silicone elastomer precursor.
In this embodiment, the reactive functional groups of precursor can be selected from Si-H functional group, Si- (C2-C6) alkenyl (such as Si- vinyl) functional group and Si-O (C1-C6) alkyl functional group.
According to a preferred embodiment, polysiloxane precursor are as follows:
Crosslinkable polymer, it includes at least one Si-H reactive functional groups and at least one Si- (C2-C6) alkenyl (such as Si- vinyl) reactive functional groups,
At least one monomer selected from siloxanes, alkoxy silane and alkyl silane, the monomer include at least one choosing From Si-H and Si- (C2-C6) alkenyl (such as Si- vinyl) functional group reactive functional groups, or
- at least two monomers selected from siloxanes, alkoxy silane and alkyl silane, one of described monomer include at least A kind of Si-H reactive functional groups, such as dialkoxy silicane, and the another one of the monomer includes at least one Si- (C2-C6) alkene Base (such as Si- vinyl) reactive functional, such as alkenyl (dialkyl group) alkoxy silane.
Cross-linkable composition also may include crosslinking catalyst, especially platinum-like compounds.Crosslinking catalyst can be selected from platinum Belong to, platinum salt, such as platinum chloride (such as platinous chloride: PtCl2, platinum tetrachloride: PtCl4), and it is further selected from platinum class complex compound, such as Karstedt catalyst as platinum (0) and the complex compound of divinyl tetramethyl siloxanes.
A particularly preferred embodiment according to the present invention, before polymer material and/or polymer material The total weight of body, the content range of crosslinking agent is about 0.1 weight % to 8 weight % in cross-linkable composition.
Cross-linkable composition according to the present invention may include crosslinking agent, such as organic peroxide.
In a specific embodiment, organic peroxide that can be used according to the invention is two tertiary alkyl peroxides Or aromatic alkyl superoxide, it is preferably selected from di-tert-butyl peroxide, 2,4- dichlorobenzoyl peroxide (DCBP), two (tert-s Butylperoxyisopropyl) benzene peroxide, dicumyl peroxide and 2,5- dimethyl -2,5- two (t-butylperoxy) hexane (DBPH)。
Relative to the total weight of polymer material and/or polymer material precursor, organic peroxy in cross-linkable composition The content range of object can be about 0.1 weight % to 8 weight %.
Cross-linked layer plays electrical, the mechanical and heat protective effect of electric cable fitting.Cross-linked layer can be at least partly or complete The attachment is surrounded entirely.
Cross-linked layer is preferably independent of the layer of attachment.In other words, cross-linked layer can be separated with cable accessory, without right The cable accessory causes most slight machinery and/or electrical damage, and will not especially make to the outermost layer of cable accessory At most slight damage.
In other words, cross-linked layer is not preferably the integral part of cable accessory, it is possible thereby to keep the electrical of cable accessory And/or mechanical integrity.More particularly, the electrically and mechanically property retention for being connected with the cable accessory of cross-linked layer is complete.
Cross-linked layer of the invention can be around the most external element of attachment or the outermost layer of attachment.
Cross-linked layer preferably with attachment direct physical contact, and especially it is direct with the most external element or outermost layer of attachment Physical contact.
Electric cable fitting preferably aims at least part or one end around power cable.
Attachment preferably includes at least one semiconductor element and at least one electrical insulation parts, these elements are intended to around electricity At least part of power cable or one end.
It is well known that semiconductor element is for controlling when the power cable for being intended to be connected to the attachment is under voltage The geometry of electric field processed.
In general, attachment can be longitudinal ducted body, such as power cable connector.Particularly, which can be by two electricity Cable links together, which is intended at least part or one end around this two cables.
A particularly preferred embodiment according to the present invention, attachment is power cable connector comprising:
- the first semiconductor element, first semiconductor element of a part or one end especially around two power cables,
Electrical insulation parts, especially around the electricity of a part or one end of the first semiconductor element and two power cables Insulation component, and
- the second semiconductor element, second semiconductor element of a part or one end especially around two power cables.
First semiconductor element and the second semiconductor element are preferably separated by electrical insulation parts.
Connector may also include one or more packing layers around the second semiconductor element.
Connector can also include third semiconductor element, especially around the third semiconductor element of electrical insulation parts.
Connector can also include around third semiconductor element from amalgamating material layer, described excellent from amalgamating material layer Choosing is surrounded by copper braided fabric, is attached on the layer especially by polyvinyl chloride (PVC) band.
Second theme of the invention is a kind of electric device comprising:
At least one power cable, and
At least part of the power cable or the attachment of one end are surrounded,
It is characterized in that, the attachment is defined such as the first theme of the invention.
Power cable can be overground cable, buried cable or submarine cable.
Cross-linked layer advantageously surrounds at least part or one end of the power cable.
In the present invention, term " power cable " is intended to indicate that poly- at least one including at least one elongate conductive elements The power cable of nitride layer or an electric insulation layer is closed, the polymeric layer or electric insulation layer surround elongate conductive elements.
The elongate conductive elements of power cable can be metal wire (sub-thread) or more wires (multiply), may be twisted , especially made of copper or aluminium or their alloy.
Power cable is preferably high voltage power cable (especially voltage is greater than 60kV).
More particularly, the power cable of device can include:
Elongate conductive elements,
The first semiconductor layer of elongate conductive elements is surrounded,
The electric insulation layer of the first semiconductor layer is surrounded, and
Surround the second semiconductor layer of electric insulation layer.
Second semiconductor layer can be grounded shielding and/or be surrounded by sacrificial metal shielding.
Second semiconductor layer can be surrounded by outer protection sheath, and when existing, when protecting sheath, which surrounds metallic shield.
Power cable may also include one or more bands between elongate conductive elements and the first semiconductor layer, especially It is when band is multiply, which can assemble the strand of elongate conductive elements.
Power cable may also include one or more expandable layers, and expandable layer is preferably the second semiconductor layer and metal screen Cover one or more strips between (when present) or between metallic shield and outer sheath (when present).It can be swollen Swollen layer may insure the direction waterproof of cable.
When attachment is connector, electric device can also include the second power cable, especially as defined above.Then, Connector can link together two power cables.
According to a specific embodiment, at least part or one end of connector around each power cable.It is more special Not, the end for each power cable to be connected is placed in the connector.
According to the embodiment, cross-linked layer can be around each power cable (especially in connector level) and connector is extremely Few a part or one end.
Device may also include the element for positioning or protecting cross-linked layer, and the element surrounds cross-linked layer.
The positioning or protection element are preferably configured to carry out step i) as described below.In other words, the positioning Or protection element is preferably able to apply cross-linkable composition.
Protection element can be hardware.The element can be the most external element of device.
The metal of hardware can be selected from copper or copper alloy.
The protection element may insure the mechanical protection of the attachment (especially connector) in device.Protection element is preferably by rigid Property material is made.Protection element can also make cross-linked layer around attachment and position especially around connector.
Protection element can be sleeve.
Setting element can be made of metal (such as copper) or polymer material (such as polyethylene).
Setting element can make cross-linked layer around attachment and position especially around connector.Once determining cross-linked layer Position, so that it may remove the setting element, and be for example replaced with protection element.Then, protection element plays such as mold Effect.
Third theme of the invention is around electric cable fitting or the friendship as defined herein in electric device Join the purposes of layer, especially for promoting heat dissipation.
Cross-linked layer is as defined herein.
Attachment and device can be as defined herein.
4th theme of the invention is related to the method for manufacturing the electric cable fitting of the first theme according to the present invention, special Sign is that the method includes at least following steps:
Step i), wherein applying around electric cable fitting (such as attachment without cross-linked layer) as the present invention first is main Cross-linkable composition defined in inscribing, and
Step ii), wherein being crosslinked cross-linkable composition.
In step i) and ii) at the end of, the attachment of step i) is crosslinked layer around (at least partially or fully).
Cross-linkable composition and cross-linked layer are as defined herein.
Step i) can be carried out by the way that cross-linkable composition to be poured on attachment, and preferred manual carries out.
Step i) is preferably carried out under environment temperature (i.e. 18 DEG C to 25 DEG C).
Step i) and ii) it can coexist.Particularly, crosslinking can apply cross-linkable composition (step i)) around attachment Period, and can be in step ii) at the end of terminate.
Step ii) it can be carried out under environment temperature (i.e. 18 DEG C to 25 DEG C) or under heating, especially it is being higher than 25 DEG C of temperature Degree is lower to carry out, and especially the range at about 30 DEG C to about 200 DEG C carries out, and the range preferably at 35 DEG C to 60 DEG C carries out.
In the present invention, the crosslinking temperature of cross-linked layer and crosslinking time depend especially on the thickness of layer, depend on the number of plies, take Certainly in whether there is crosslinking catalyst, crosslink type etc. is depended on.
By determining gel content to monitor the variation being crosslinked, those skilled in the art will be readily determined these ginsengs Number, to obtain cross-linked layer.
Step ii) (step i) respective) can carry out under stress, carry out especially by pump.It is possible thereby to avoid handing over Bubble is formed in connection layer.
This method can also include step i) before the step i for preparing cross-linkable composition0)。
Step i0) may include mixing as the present invention the first theme defined in boron nitride, silicon carbide and polymer material or The precursor of at least one polymer material.
Step i0) preferably carried out by mixer.
Step i0) and can ii) coexist.In this case, crosslinking (can be walked when starting to prepare cross-linkable composition Rapid i0)) start, and can be in step ii) at the end of terminate.
It is crosslinked ii) preferably in step i0) and i) beginning later, especially for promotion step i).
Attachment used in step i) is preferably connector.
5th theme of the invention is a kind of method for manufacturing the device of second theme according to the present invention, which is characterized in that The method includes at least following steps:
Step a), wherein installation electric cable fitting (for example, the attachment for being free of cross-linked layer), and
The step i) and ii as defined in the 4th theme of the invention).
Attachment can be applied by at least part or one end for surrounding power cable to carry out step a).
When attachment is connector, step a) especially can install cable connector around at least two power cables.
Preferably, can be by welding the end for two cables to be connected, and pass through around two cables to be connected End applies connector to carry out step a).
This method can also include step i) before the step i as defined in the 4th theme of the invention0)。
This method may additionally include step i) before or in step i0) before step a1), it is used wherein applying around attachment The element of the cross-linked layer defined in positioning or the protection present invention, configures the positioning or protection element enables to carry out step i)。
In step a1) at the end of, setting element or protection element surround cross-linked layer.
Step a1) usually in step a) and i) between or step a) and i0) between carry out.According to the embodiment, such as this hair It is bright to be defined, cable accessory is installed according to step a) first, then according to step a1) around attachment application setting element or protection Element, then according to step i), ii) [and the i before optionally step i)0)] around attachment formation cross-linked layer.
In other words, in this embodiment, the configuration of setting element or protection element makes it possible to be enclosed according to step i) Apply cross-linkable composition around attachment.
For example, setting element or protection element may include one or more apertures, for carrying out step i).
In addition, setting element or protection element can be configured to make (in terms of its shape and its size) in step a1) knot Shu Shi forms enough spaces between attachment (the especially outer surface of attachment) and the element.It is possible thereby in step I) and ii) during promote diffusion and its crosslinking of the cross-linkable composition in the space.
When element be the setting element such as third theme of the invention defined in when, can be in step ii) after removing described in Element, as long as forming cross-linked layer around attachment.Then, this method, which may also include, applies such as of the invention the around cross-linked layer The step of protection element defined in three themes.
6th theme of the invention is a kind of external member, is used for defined connector through the invention and connects two electric power electricity Cable, which is characterized in that the external member includes:
Boron nitride,
Silicon carbide, and
The precursor of at least one polymer material,
Above compound is intended to be formed cross-linkable composition as defined herein, and
For positioning or protecting the element of cross-linked layer as defined herein, configures the element and enable to apply Add cross-linkable composition (the step i) of the method seen above).
7th theme of the invention is a kind of electric cable fitting, which is characterized in that the attachment is exhausted by least one electricity Edge cross-linked layer surrounds, and the thermal conductivity when cross-linked layer includes at least one polymer material, is 35 DEG C at least one is CT1It is (single Position is Wm-1·K-1) the first filler and it is 35 DEG C at least one when thermal conductivity be CT2(unit Wm-1·K-1) Two fillers, so that CT2≥CT1+40W·m-1·K-1。
First filler and the second filler preferably have different chemical property.In other words, the first filler and the second filler With different chemical compositions.
Thermal conductivity CT of first filler at 35 DEG C1It can be up to 300Wm-1·K-1。
Thermal conductivity CT of second filler at 35 DEG C2It can be at least 340Wm-1·K-1, and the heat preferably at 35 DEG C Conductance is at least 350Wm-1·K-1。
The cross-linked layer of attachment can be obtained advantageously by cross-linkable composition, and cross-linkable composition includes the first filler, second The precursor of filler and at least one polymer material.
Attachment, electrical isolation cross-linked layer, polymer material and the polymer material precursor can be as main such as of the invention first Topic is defined.
A particularly preferred embodiment according to the present invention, the first filler are boron nitride.Boron nitride can be such as the present invention The first theme defined.
A particularly preferred embodiment according to the present invention, the second filler are silicon carbide.Silicon carbide can be such as the present invention The first theme defined.
Detailed description of the invention
It will make of the invention its according to the description of the non-limiting example of the apparatus according to the invention provided referring to attached drawing He displays feature and advantage.
Fig. 1 shows the schematic diagram of the longitudinal cross-section of the apparatus according to the invention；
Fig. 2 shows the samples of the sample of cross-linked layer C1 according to the present invention (curve of Diamond spot) and cross-linked layer CA (just The curve of square dot) the function as frequency (Hz) electric dissipation factor curve.
Specific embodiment
Fig. 1 shows the schematic diagram of the longitudinal cross-section of the apparatus according to the invention comprising is connected to two electricity of connector Power cable, component cross-linked layer defined in the present invention surround.
For the sake of clarity, only symbolically show to understanding the indispensable element of the present invention, the figure not press than Example is drawn.
Fig. 1 shows device 101 comprising partially around the connector 20 of two power cables 10a and 10b, and also Including around connector 20 and two power cables 10a and 10b at least part of cross-linked layer 30 of the invention.
The cross-linked layer 30 surrounds at least part or one end of connector 20 and power cable 10a and 10b.
More particularly, cross-linked layer 30 surrounds a part, a part of power cable 10b and the connector 20 of power cable 10a Whole, along device 101 extend.
By the example of power cable and connector, the power cable 10a and 10b of Fig. 1 can be more specifically described and connect First 20.
Power cable 10a includes end 10'a, and power cable 10b includes end 10'b, it is intended to is electrically connected simultaneously It is surrounded by connector 20.
The main body of connector 20 includes the first semiconductor element 21 and the second semiconductor element separated by electrical insulation parts 23 22, the semiconductor element 21,22 and the electrical insulation parts 23 surround the end 10'a and power cable of power cable 10a The end 10'b of 10b.Electrical insulation parts 23 surround the first semiconductor element.
First power cable 10a include elongate conductive elements 2a, around elongate conductive elements 2a the first semiconductor layer 3a, Electric insulation layer 4a around the first semiconductor layer 3a and the second semiconductor layer 5a around electric insulation layer 4a.
Second power cable 10b include elongate conductive elements 2b, around elongate conductive elements 2b the first semiconductor layer 3b, Electric insulation layer 4b around the first semiconductor layer 3b and the second semiconductor layer 5b around electric insulation layer 4b.
At the end 10'b of the end 10'a and the second power cable 10b of the first power cable 10a, by the first electric power electricity Level of the elongate conductive elements 2b of the elongate conductive elements 2a of cable 10a and the second power cable 10b in region 24 is welded, so as to It is electrically connected the cable.
Second semiconductor layer 5a, 5b is at least partly stripped, so that electric insulation layer 4a, 4b are positioned at least partially at and connect In first 20, without by second semiconductor layer 5a, 5b covering of cable.
Inside connector 20, the electrical insulation parts 23 of electric insulation layer 4a, 4b and connector 20 and the first semiconductor element 21 are straight Connect physical contact.22 direct physical contact of the second semiconductor element of second semiconductor layer 5a, 5b and connector 20.
Connector 20 may also include one or more packing layers 25 around the second semiconductor element 22.
Connector 20 may also include third semiconductor element 26, especially around the third semiconductor element of electrical insulation parts 23 26。
Connector 20 may also include around third semiconductor element from amalgamating material layer, described excellent from amalgamating material layer Choosing is surrounded by copper braided fabric, is attached on the layer especially by polyvinyl chloride (PVC) band.
The manufacture of the apparatus according to the invention
Apply cable connector around end, end to end connects and welds two with trade name VM-A/HOP sale High voltage power cable.Two ends of the connector at least about the power cable.Connector includes: around the first the half of the end Conductor element, the insulation component around first semiconductor element and the end and the second half around the end lead Volume elements part.Connector further includes around the third semiconductor element of electrical insulation parts, around third semiconductor element from amalgamation Material layer and packing layer around the second semiconductor element.
Apply the clad being made of copper, around connector to surround at least part or one of connector and the cable End.
It will be by 3M Technical Ceramics company with trade name Powder Cooling Filler Platelets The 2kg boron nitride of sale and by Saint-Gobain Ceramic Materials GmBH company with trade name SIKA TECH pin The 4kg silicon carbide sold is mixed with the precursor for the silicone elastomer sold with 8213 A of trade name Bluesil RT Gel, to be formed First chamber.Concurrently, by 2kg boron nitride as described above and 4kg silicon carbide and with trade name Bluesil RT Gel The precursor mixing of the silicone elastomer of 8213 B sale, to form second chamber.One of above-mentioned composition is crosslinked comprising platinum class Catalyst.Using the mixer sold by Speed Mixer company with trade name DAC 400Mixer to above two combination Each in object is homogenized.
Then above two composition is merged and is mixed, to form resulting cross-linkable composition.
Then resulting cross-linkable composition is poured into the space formed between the outermost layer of connector and clad manually In.During filling step, any possible bubble formed in cross-linkable composition is eliminated using pump.
It is crosslinked the composition about 24 hours, surrounds the connector to be formed Cross-linked layer C1.
As a comparison, being free of boron nitride and the not friendship of silicon carbide-containing according to method identical with the method for layer C1 preparation Join layer CA.Therefore, cross-linked layer CA is not a part of the invention.
Using the apparatus measures sold by Hot Disk company with trade name Hot Disk TPS 2500S having a size of 44m × Thermal conductivity of the sample of the sample of the cross-linked layer C1 of 48m × 8mm and the cross-linked layer CA with identical size at about 35 DEG C.
Thermal conductivity of the sample of cross-linked layer C1 at 35 DEG C is 0.44W/m.K, and the sample of cross-linked layer CA is mutually synthermal at this Thermal conductivity be 0.17W/m.K.
Using the instrument sold by Novocontrol company with trade name Alpha Dielectric Analyzer to ruler The sample of the very little cross-linked layer CA for the sample of 44mm × 48mm × 1.52mm cross-linked layer C1 and with identical size carries out dielectric Spectrum test.In order to apply the electric field of 0.658kV/mm, measured under 1000 volts, frequency range be 0.1Hz extremely 10000Hz。
These tests can be determined as the electric dissipation factor (or fissipation factor) of the function of frequency [according to IEC 60250 (1969) it that is, at 18 DEG C to 25 DEG C, is evaluated at ambient temperature based on tangent δ (tan δ) with 62631 standard of IEC].
Fig. 2 shows the samples of the sample of cross-linked layer C1 according to the present invention (curve of Diamond spot) and cross-linked layer CA (just The curve of square dot) the function as frequency (Hz) electric dissipation factor curve.Tangent of an angle, which is lost, to be indicated in dielectric The energy to be dissipated with form of heat.
The curve of cross-linked layer C1 of the invention has negative slope, this shows it with capacitor (insulation) property.
Use the apparatus measures sold by Novocontrol company with trade name Alpha Dielectric Analyzer The conductivity value of cross-linked layer C1.When frequency is 0.1Hz, conductivity is 2 × 10-12S/m, and frequency is lower than 100Hz (direct current Frequency used) when, conductivity is at most 10-9S/m, this demonstrate the insulating property (properties)s of this cross-linked layer.
Other tests show that the cross-linked layer around attachment can make the temperature of the hottest point of connector reduce about 10 DEG C.

Claims (18)

1. electric cable fitting, which is characterized in that the attachment is surrounded by least one electrical isolation cross-linked layer, the cross-linked layer packet Containing at least one polymer material, boron nitride and silicon carbide.
2. attachment according to claim 1, which is characterized in that relative to the total weight of the cross-linked layer, the cross-linked layer Include 1 weight % to the boron nitride of 30 weight %.
3. attachment according to claim 1 or 2, which is characterized in that relative to the total weight of the cross-linked layer, the crosslinking Layer includes the silicon carbide of 2 weight % to 40 weight %.
4. attachment according to any one of the preceding claims, which is characterized in that the polymer material is organic selected from gathering Siloxanes.
5. attachment according to any one of the preceding claims, which is characterized in that the boron nitride is the shape of elongated particle Formula.
6. attachment according to any one of the preceding claims, which is characterized in that the silicon carbide is the shape of spheric granules Formula.
7. attachment according to any one of the preceding claims, which is characterized in that the silicon carbide and the boron nitride are The form of micron particles.
8. attachment according to any one of the preceding claims, which is characterized in that the thermal conductivity of the cross-linked layer is at least 0.18 W/m.K。
9. attachment according to any one of the preceding claims, which is characterized in that the cross-linked layer and the attachment are direct Physical contact.
10. attachment according to any one of the preceding claims, which is characterized in that the attachment is power cable connector.
11. electric device, comprising:
At least one power cable, and
At least part of the power cable or the attachment of one end are surrounded,
It is characterized in that, the attachment such as any one of claims 1 to 10 is defined.
12. device according to claim 11, which is characterized in that the attachment is connector, and the electric device is also Including the second power cable, at least part or one end of the connector around each power cable.
13. a kind of purposes for the cross-linked layer that is electrically insulated, the cross-linked layer include at least one polymer material, boron nitride and carbonization Silicon, the cross-linked layer is around the electric cable fitting as defined in any one of claims 1 to 10 or in such as claim 11 With any one of 12 defined in electric device, the cross-linked layer is for promoting heat dissipation.
14. the method for manufacturing the electric cable fitting as defined in any one of claims 1 to 10, which is characterized in that described Method includes at least following steps:
Step i), wherein around electric cable fitting apply comprising the precursor of at least one polymer material, boron nitride and The cross-linkable composition of silicon carbide, and
Step ii), wherein being crosslinked the cross-linkable composition.
15. the method for manufacturing the device as defined in any one of claim 11 and 12, which is characterized in that the method includes At least following steps:
Step a), wherein electric cable fitting is installed,
Step i), wherein applying the precursor comprising at least one polymer material, nitridation around the electric cable fitting The cross-linkable composition of boron and silicon carbide, and
Step ii), wherein being crosslinked the cross-linkable composition.
16. according to the method for claim 15, which is characterized in that the method also includes the step of before step i) a1), wherein applying the element for positioning or protecting the cross-linked layer around the attachment, configure the setting element or protection member Part is so that step i) is able to carry out.
17. a kind of external member, for connecting two power cables by connector as defined in claim 10, which is characterized in that The external member includes:
Boron nitride,
Silicon carbide, and
The precursor of at least one polymer material,
Above compound is intended to be formed cross-linkable composition, and
For positioning or protecting the element of the cross-linked layer, configures the element and enable to apply the cross-linking combination Object.
18. electric cable fitting, which is characterized in that the attachment is surrounded by least one electrical isolation cross-linked layer, the cross-linked layer It is CT comprising at least one polymer material, at least one thermal conductivity at 35 DEG C1(unit Wm-1·K-1) first fill out Material and at least one thermal conductivity at 35 DEG C are CT2(unit Wm-1·K-1) the second filler so that CT2≥CT1+ 40W·m-1·K-1。
CN201910276147.6A 2018-04-05 2019-04-08 The cable accessory of thermal conductivity with raising Pending CN110350450A (en)

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EP3550687A1 (en) 2019-10-09

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